<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @copyright   Copyright (c) 2014 X.commerce, Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */
namespace Magento\Ui\DataProvider;

use Magento\Framework\ObjectManager;

/**
 * Class RowPool
 */
class RowPool
{
    /**
     * @var RowInterface[]
     */
    protected $classPool;

    /**
     * @var ObjectManager
     */
    protected $objectManager;

    /**
     * Constructor
     *
     * @param ObjectManager $objectManager
     */
    public function __construct(ObjectManager $objectManager)
    {
        $this->objectManager = $objectManager;
    }

    /**
     * Getting provider object
     *
     * @param string $class
     * @param array $arguments
     * @return RowInterface
     * @throws \InvalidArgumentException
     */
    public function get($class, array $arguments = [])
    {
        if (!isset($this->classPool[$class])) {
            $this->classPool[$class] = $this->objectManager->create($class, $arguments);
            if (!($this->classPool[$class] instanceof RowInterface)) {
                throw new \InvalidArgumentException(
                    sprintf('"%s" must implement the interface \Magento\Ui\DataProvider\RowInterface', $class)
                );
            }
        }

        return $this->classPool[$class];
    }
}
